I Need Some Help With Square Root Functions?

[success123]

I have some homework on square root functions and I am having trouble with this question:

Function; f(x)= -1√(-qx+12) +p
btw: -qx+12 is the only part under the root.

Which of the following is true?
a ) p>0, q>0
b ) p<0, q>0
c ) p<0, q<0
d ) p>0, q<0

And there is a diagram of the function that i have on Photobucket, but since I am a new member, I am not allowed to post links...
But the vertex is in the 1st Quadrant and it is reflected about both the x and y axis.
Thank you

P.S I have solved this before and I figured out that the correct answer is D. However I may be wrong though. I thought is was D because if you sketch the graph, "p" is obviously positive. But it is also a transformed function where it is reflected about both the x and y axes. Therefore since it was reflected about the y axis, q should also be negative, right?

This post has been edited by success123 on Dec 13 2011, 11:30 PM

[Matador]

er maybe3 someone can help